Target indicator



C. GRIGORIU TARGET INDICATOR Filed July 23, 1934 Feb. 22, 1938.

2 sheets-sheet 1 y autor:

Il! V Feb. 22, 1938. c. GRIGORIU 2,108,919

TARGET INDICATOR Filed July 23, 1934 2 Sheets-Sheet 2 llllllld i wat, r

0 Gfrgoraza,

UNiTED STATES PATIENT OFFICE Cesar (T'lgRoGrlllzlTlleAsollmania Application July 23, 1934, Serial No. 736,583 In Rumania July 27,11933 2 Claims.

` The present invention relates means for ini ment, and in so doing, by means of suitable projections, come into contact with longitudinally and transversely .extending contact conductors arranged behind the recoil plates, these contact conductors being in conductive communication with an indicator mounted at the place of shooting, and being adapted to perforate a strip of paper in the indicator by actuation of suitable punching pins, thereby enabling the point Vhit to be accurately recorded upon` the strip of paper.

Examples of construction of the apparatus according to the invention are illustrated in the accompanying drawings, in which Figure 1 is a general view of the apparatus, Figure 2 is a cross section and also a back view of the target, y Figure 3 shows an indicator in which the results recorded by perforation are marked on a facsimile target by hand, the indicator being shown in cross section,-and in plan with the front plate removed, and the front plate also being shown with a shooting bulletin clamped in it.

Figure 4 is a cross section through the indicator shown ln Figure 3.

The apparatus according to the invention consists of a portable or travelling target I, an indicator 2, a connecting cable 3, and a source of current such as a group of electric batteries 4.

Behind the target I, which may be a round or square steel plate secured in a frame, are provided square recoil plates 5 arranged in series over the entire internal surface of the target, these recoil plates being pressed against the target I by springs 'l mounted upon transverse channel irons 6 secured to the frame of the target. Each recoil plate can therefore execute a recoil movement in the event of the target being hit, the particular recoil plate that moves being determined by the point of the target which is hit. 'Ihe recoil plate is then immediately lreturned into its original position bythe corresponding spring 1. At the back of each recoil plate 5 are arranged four contact projections 8, which, as the plate 5 recoils, come into contact with contact conductors 9, I0, which are insulated from one another. These contact conductors 9 and vI5 are secured inthe target frame and extend in two planes, both in a horizontal and in a vertical direction, so that the plate 5 recoiling as a result of a hit touches at least one horizontal and one vertical conductor. Figure 2 shows two parallel conductors for each horizontal and each vertical rowv of recoil plates, each pair of parallel conductors belonging to one circuit, which is normally open but is closed by the corresponding recoil plate in indicating ahit. If the recoil plates 5 or contact projections 8 were earthed, one conductor for each horizontal and each yvertical row would be sufficient. This is diagram- `matically suggested in Figure 2 by showing one of the recoil plates earthed.- In either case there would be one circuit for each horizontal row and one circuit for eachv vertical row. Upon a target carrier II is furthermore provided a metal shield I2 for catching the splinters or fragments arising from the shot.

The indicator shown in Figure 3 consists of a tripod I3, with a casing, which contains a number of electro-magnets I4, I5, which correspond to the aforementioned contact conductors mounted behind the recoil plates 5, and which are arranged in two separate groups placed at right angles to one another, so that the electro-magnets Il corinected with the horizontal contact conductors 9 are likewise horizontal, and the electro-magnets I5 allocated to the vertical contact conductors III extend perpendicularly thereto.

The target shown in Figure 2 has its impact plates 5 arranged in ten horizontal rows and in ten vertical rows. |I'he indicator would therefore require twenty electro-magnets, arranged in two groups of ten each. To obviate undue complexity in the drawings, however, the indicators have been shown with only five electro-magnets in each group.

Each of these groups of electro-magnets Ill, I5 forms a separate mechanism, one ofV which is illustrated in Figure 4, for actuating a pin I5, the duty of which is to perforate the shooting bulletin for the purpose of indicating the particular point hit. The pins of allthe electro-magnets of both the groups I4, I5 are arranged perpendicularly to a stnp of paper Il, which is clamped in a frame I8, secured in front of a corresponding aperture inthe front wall of the casing 2.

The pins I6 are longitudinally slidable in a pincarrier 22, and any pin can be shot forward for the purpose of piercing the paper Il by its electromagnet I 4, through the medium of a lever Ila, which is pivoted at one end to the pin I5 and connected at the other end by a pivoted link IIb with the armature or plunger of the electro-magnet.

The pin-carrier 22 is ro-ckably mounted on a shaft I9, so that the pins I6 as a group can change their position together in successive steps fromI :c to y, thus perforating the bulletin I1 at aslightly different positionl for each hit. With the bulletin shown in Figure 3, ve successive shots can be indicated or recorded before the sheet need be changed. At the end of the pincarrier remote from the point of the pin a ratchet-toothed segment 22a is provided, and with these ratchet teeth there engage a pawl 20 for feeding the pin-carrier forward and a detent 23 has to be inserted.

to prevent it from moving backwards. The pawl 20 is actuated by means of an electro-magnet 2|, the winding of which is connected in series with each of those of the electro-magnets I4. When a circuit is closed, the pawl 20 advances idly over one tooth on the carrier, against the pull of a spring 24, this idle advance taking place while the paper I'I is being pierced by one of the pins I6. As soon as the circuit is (ie-energized again the spring 24 retracts the pawl 20 and thereby advances'the pins I6 through a small angle. The pawl 20 is pressed against the teeth 22a of the pin-carrier by a spring 21, and the detent 23 is kept in contact with the said teeth by a spring 26, acting through the medium of a rod 23, which is pivoted to the detent.

At the end of a series of ilve shots, the frame I8 is rocked up about its hinge Ita for the purpose of enabling the used bulletin to be replaced by a fresh sheet. During this operation the frame I 8 pushes against the end of the rod 28, which projects out of the casing 2 through an aperture, and thereby disengages the detent 23, and with it the pawl 20, from the teeth of the pin-carrier. The latter then immediately swings back from the position y to the position :z: under the pull of a spring 25.

The connection between the target I and the indicator 2 is established by means of a cable 3, which consists of a series of wires insulated from one another, the number of which corresponds to that of the co-ordinates, that is to say, the vertical and horizontal contact conductors, provided behind the recoil plates. This cable 3 is interrupted at definite distances by contact boxes 30, in which the contact cable of the target, and also the electric battery cells 4, are connected. Furthermore these boxes enable the target to be set up at various places, according to the range required.

The method of operation of the apparatus described is as followsz-After establishing and checking the conductors connecting the target i with the indicator 2, and those connecting the latter with the source of current 4, the shooting begins, a suitable strip of paper I'I being ilrst clamped in the indicator frame I8. The indicat ing upon the paper strip now proceeds in such a way that at each shot the two pins I6 that are electrically connected with the particular plate 5 that recoils as a result of a hit, pierce the paper strip I1 in the subdivisions corresponding to the hit, and the entire series of pins IE, after each shot, is rocked by the two pawls 20 through a certain angle corresponding to one tooth of each of the pin-carriers 22.

, The shooting bulletins usually have subdivisions ior indicating ve shots, so that after dis= charging the same a fresh strip of paper always The evaluation of the result indicated is extremely simple. The shooting bulletin has a horizontal compartment 29 and a vertical compartment 29 corresponding to the electro-magnets I4 and I5 respectively, each with ve subdivisions in which the appropriate pins I6 indicate by perforations which recoil plate was hit. Between these two compartments 29 is located a third compartment, which reproduces the target on a reduced scale, and upon which, by the point of intersection of the vertical projections of the perforation point marked in the horizontal and vertical compartments, the exact point hit upon the target I can be recorded by hand.

The advantages of the device according to the invention are obvious, an immediate and exact indication, in a device mounted at the place of shooting, of the result of the shooting at a distant target, the recording of this result in a permanent shooting bulletin, the possibility oi' dispensing with the operating and indicating stail hitherto usually employed at or near the target, and the possibility of carrying out shooting practice independently of the weather.

The appliances described above and illustrated in the drawings are merely to be regarded as constructional examples of the invention, which may be modified as desired or required on the lines laid down.

What I claim is:-

l. In a device for recording the hits on a target, having a frame for supporting a record strip, the combination of a group of punching pins arranged to pierce the record strip for recording the horizontal co-ordinates of parts o1' the target, with electro-magnets for operating said punching pins, a second group of punching pins arranged to pierce the record strip for recording the Vertical co-ordinates of the said points, a second group of electrmagnets for operating the second group of punching pins, circuit-closing devices on the target arranged thereon for actuation by impacts of a projectile on the target, each of said circuit-closing devices being included in a separate circuit containing one electro-magnet of each group, so that on a projectile striking the target and actuating one of said circuit-closing devices, the record strip will be pierced by a punching pin representing a horizontal co-ordinate and a punching pin representing a vertical co-ordinate, displaceable supporting means for each group of punching pins, and means operative concurrently with. any of said electro-magnets for displacing said supporting means a predetermined distance.

2. In means for marking the results of shooting at a target, comprising signalling means at the target for energizing electrical circuits correspondingto the horizontal and vertical co-ordinates of the point hit and a frame adapted to accommodate an exchangeable strip of paper upon which the shooting results can be recorded, marking means for recording the said co-ordinates, said marking means comprising a group of electro-magnets separately energizable by the circuits corresponding to the horizontal co-ordihates, the particular electro-magnet energized depending upon the magnitude oi the horizontal co-ordinate signalled, a second group of electromagnets separately energizable by the circuits corresponding to the vertical co-ordinates, the particular electro-magnet energized depending upon the magnitude of the vertical co-ordinate signalled, two groups of punching pins corresponding tothe two groups of electro-magnets, each electro-magnet when actuated causing a particular punching pin to pierce the record strip, a rockable carrier for each group of punching pins, all the punching pins of the group being slidably guided on the carrier so that when the carrier is oscillated through a small angle all the punching pins of the group face a fresh portion of the record strip, and means for rocking each of the two said carriers through a small angle every time a hit is signalled.

CESAR GRIGORIU. 

